function organizationuser() {
            var organization_user = document.myform.organization_user.value;
            var organization_usertab = document.getElementById('organization_usertab');
            if(/^[\u4e00-\u9fa5_a-zA-Z0-9]{2,18}$/.test(organization_user)){
                organization_usertab.innerHTML = '√';
                organization_usertab.style.color = '#0a0';
                return true;
            }else{
                organization_usertab.innerHTML = '×';
                organization_usertab.style.color = '#f00';
                return false;
            }
        }


        // 表单提交验证
        function checkForm() {
            return organization_user();
        }